YAMAHA DT80

79cc Petrol Class 1

82.4%

first-time pass rate

9.9%

failed outright

14,316

median miles at test

142

MOT tests, 2005–2025

Pass rate by mileage

how the DT80's first-time pass rate falls with the odometer · class average 73.4%

A low-mileage DT80 passes first time 87.2% of the time; by 20k that's 83.3%.

First-time pass rate by odometer reading at test, 10,000-mile bands for this model. Mileage is the strongest reliability signal. See the full curve.

What fails on a DT80

failure defects by component group · advisories excluded

Component group	Defects	% of defects
lamps and reflectors	11	32.4
brakes	7	20.6
suspension	4	11.8
steering and suspension	2	5.9
structure and attachments	2	5.9
audible warning (Horn)	2	5.9
drive system	2	5.9
lighting and signalling	2	5.9
fuel and exhaust	1	2.9
tyres and wheels	1	2.9

Defects recorded against failed normal tests, 2005–2025, grouped by DVSA inspection section. One test can record multiple defects.

How rivals compare

same type, similar capacity, high test volume

On first-time pass rate the DT80 beats 4 of its 4 closest rivals (HONDA C90, HONDA SCV100, YAMAHA YQ100).

HONDA C90 79.3% pass · 92.8k tests HONDA SCV100 70.7% pass · 31.3k tests YAMAHA YQ100 64.7% pass · 7,747 tests YAMAHA RXS100 68.0% pass · 6,955 tests

Rivals share this bike's type and sit within ±30% of its engine capacity, ≥ 5,000 tests. Card colour = better/worse first-time pass rate than the DT80.